Unmanned Voice Controlled Robotic Car Used in Application of Inaccessible Area

A voice-controlled robotic system presents a practical solution for operations in hazardous and inaccessible environments where human intervention may be risky [1], [2], [9]. Verbal commands are fundamental to human communication, making voice-based control intuitive for robotic systems [3], [8]. In this project, a robotic vehicle has been developed that operates through voice instructions transmitted via an Android smartphone, using Bluetooth communication with the HC-05 module and an Arduino Uno microcontroller [1], [4], [6]. The vehicle’s movement is powered by two DC gear motors managed through a motor driver circuit (L293D), enabling it to move forward, backward, left, and right based on the commands [5], [7]. Commands captured through the Android application are converted into control signals, sent via Bluetooth to the Arduino, and executed through the motor driver shield [4], [5]. An ultrasonic sensor was integrated for obstacle detection and avoidance, safeguarding the robot’s movement in complex terrains [2], [10]. Initial tests validated the reliability and effectiveness of the system in inaccessible areas, demonstrating its practical applications in real-world scenarios [2], [10]. II.